Rear spoiler of an automobile



FIG. 1 is a front perspective view of a rear spoiler of an automobile, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

In the drawings, the broken lines show portions of a rear spoiler of an automobile and form no part of the claimed design. 

The ornamental design for a rear spoiler of an automobile, as shown and described. 